Team, S. “Existence and Uniqueness of Solution for Two-Dimensional Fuzzy Volterra-Fredholm Integral Equation: Ho Vu, Le Si Dong”. Thai Journal of Mathematics, vol. 19, no. 4, Dec. 2021, pp. 1355–1365, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1238.